Cloth pressing device for sewing machines



Oct. 29, 1957 L. BONO 2,811,124

CLOTH PRESSING DEVICE FOR SEWING MACHINES Filed Aug. 4, 1954 INVENTOR. q1 BOA/0 United States Patent CLOTH PRESSING DEVICE FOR SEWING MACHINESLuigi Bono, Pavia, Italy, assignor to Vittorio N ecchi Societa perAzioni, Pavia, Italy Application August 4, 1954, Serial No. 447,817Claims priority, application Italy April 10, 1954 1 Claim. (Cl. 112-235)The present invention relates to a special cloth pressing device forsewing machines suited for two-needle sewing.

As is known, the common cloth pressing device is the member that underthe action of a spring holds the work pressed against the needle plateand against the toothed transport grip. Zigzag-sewing machines, in whichthe needle bar besides displacing with reciprocating vertical movementalso displaces laterally with adjustable amplitude, may be also providedfor sewing with two needles. In fact, with the two needles close andparallel to each other in a plane parallel to the advancement of thework it is possible to obtain, by suitable actuation of the controls forneedle displacing and for adjusting the amplitude of the zigzag, a vastrange of embroidery designs specially if the two needles are threadedwith yarns of different colours.

It is known that the cloth pressing devices provided for zigzag sewingwith one needle are equipped, in the plane that comes in contact withthe work, with a slot necessary to contain the maximum amplitude oflateral displacement of the needle. equipment said slot should be widerto contain the displacement of two combined needles parallel to thedirection of transport. This wider aperture is useful for a bettervisibility of the seam but has on the other hand the inconvenience thatduring the extraction of the needles from the cloth, specially if thelatter is thin, the needles drag the cloth along with their movementwith the consequence of bad sewing with skipped stitches.

To obviate these inconveniences it is proposed to form a cloth pressingdevice in accordance with the present invention, with the usual shape ofconventional devices of the kind described but having a wider slotprovided with a thin traverse in suitable position, adapted to preventthe needles from dragging the cloth out of said slot and permitting atthe same time good visibility of the seam.

Evidently for double-needle Fig. 1 shows a perspective view of thedevice connected 5 with the pressing bar.

Fig. 2 is a partial section of the device along the vertical plane ofsection line II-II of Fig. 1.

The device indicated at P is composed of the stem 1 and of the forkedsole 2, connected with each other by means of the pin 3; the stem 1 isconnected with the pressing bar 4 that supports it by means of the screw4'.

On the sole there is provided a slot 5 divided by a thin traverse 6arranged orthogonal to the direction of transport in the lower part ofthe machine in such a way that during sewing it is in contact with thecloth.

The two needles 7 fixed to the needle bar 8 by means of the clamp 8,which are arranged in a plane parallel to the direction of advancementof the work, move during zigzag sewing in the corresponding portions ofthe slot 5 confined by the traverse 6.

Hence, as already said, the traverse prevents the needles duringextraction from the cloth, from dragging the cloth along with them outof the slot, thus avoiding a skipping of stitches.

Moreover, said traverse is so thin as to permit good visibility of theseam through the slot 5.

I claim:

A presser foot for sewing machines provided with a needle-bar carryingtwo needles arranged in a plane parallel to the cloth-feed direction andperforming zigzag sewing, comprising a presser body having an apertureof substantial width for allowing zigzag sewing and a substantial lengthfor providing clearance for said two needles, a transverse bar mountedupon said presser body at right angles to the cloth-feed directiondividing said aperture into two parts, in each of which parts a needleis operative, said transverse bar throughout its length being flush withthe bottom surface of the presser-foot whereby said transverse bar ispressed on the fabric.

References Cited in the file of this patent UNITED STATES PATENTS

